Harrow attachment for drills



Jan. 23, 1940. J. A. CHARLES HARROW ATTACHMENT FOR DRILLS Filed Nov. 1, 1957 Patented Jan. 23, 1940 UNITED STATES PATENT OFFICE 1 Claim.

My invention relates to an improvement in harrow attachments for drills. The object of my invention is to provide a harrow device that may be attached to a drill in such a manner 5 that the device will harrow the ground between the lines Where the discs of the drill will run.

Another object is to provide a device of the kind mentioned that is' light, easy and cheap to manufacture and easy to install on any drill.

l 'I'hese and other objects will be more fully explained as this description progresses.

Now referring to the accompanying drawing, Fig. 1 is a plan view of a drill, to which my improved harrow attachment has been applied,

l parts being broken away for convenience of illustration. Fig. 2 is a front view of the drill and harrow attachment, shown in Fig. 1. Fig. 3 is a side view of the drill and harrow attachment shown in Figs. 1 and 2. Fig. 4 is an enlarged detail perspective View, illustrating the parts of the harrow attachment and operating mechanism therefor.

Similar numerals of reference designate the same part throughout the several figures of the drawing.

In the drawing is shown the conventional drill, having a frame, which comprises the end members III and Illa, which are rigidly joined together by the front cross member II and the rear cross member I2 and the intermediate cross member I3, said frame being supported on Wheels I4 and I5.

The frame is provided with a. tongue element comprising a pair of angle iron elements I6 and I'I and a stress bar I8. The outer ends of the angle irons I6 and I1 being joined together by a gusset plate I9, and the other ends of angle irons I6 and I'I being Widely Separated and rigidly attached to the cross members III3 of the frame of the drill. The stress member I8 is also rigidly attached to the gusset plate I9, and the cross members II and I3 of the drill frame, stress member I8 being positioned substantially midway between the ends of the drill frame. At 20 are shown a series of discs that are equally spaced apart and are revolvably mounted on bearing blocks 2|, that are rigidly attached to hanger brackets 22, that are pivotally mounted on the front cross member II of the frame of the drill. The means of raising and lowering the discs is not shown in this drawing in view of the fact that it is of no consequence in my invention. The foregoing described parts are found on most all conventional drills, therefore they are not part of my invention, although my invention is dependent on and is associated with some of these parts. My invention comprises a plurality of L shaped bars 23, one leg. of which rests on the cross members II and I3 and is rigidly attached thereto by means of bolts or 5 rivets and the other leg of the member 23 depending downwardly from the front frame member II, said L shaped members 23 being spaced apart along the frame elements II-I3 as shown in Figs. 1 and 2. The depending end of the 10 element 23 is provided with a series of holes 24, the object of which will be later explained. Each of the depending legs of the elements 23 is provided with a supplementary leg element 25, the upper end of which is provided with a series of 15 holes 26 that are adapted to register with the holes 24 in the element 23, so that the supplementary leg 25 may be raised or lowered along the depending leg of element 23 for adjustment purposes and when the supplementary leg 25 is 20 properly positioned against the dependent leg 23, bolts 2l and 28 may be passed through the holes 24 and 25 and nuts 29 and 30 may be threaded on the bolts 21 and 28 to rigidly bind and hold -the supplementary leg 25 on the depending 23 leg of the element 23. The lower end of the supplementary leg 25 is rolled so as to form a bearing in which, is revolvably positioned a shaft or pipe element 3|. Adjacent either end of the pipe element 3l and positioned thereon is a washer 32 30 that rests against the rolled end of the supplementary leg element 25 and at 33 is a cotter pin passing through the shaft or pipe 3l and resting against the washer 32 to prevent the longitudinal movements of the shaft or pipe 3I 35 in its bearings in the supplementary legs 25. Rigidly mounted on the shaft 3| and adjacent the endsl thereof is a pair of lever arms 34 and 34a. To the upper end of each of the lever elements 34 and 34a is attached one end of a. 40 chain 35. The links of the chain are adapted to be hooked on a hook 36 that is rigidly attached to the front cross element II of the frame behind the lever elements 34 and 34a so that the levers 34 and 34a may be securely tied in any position 45 in which they may be set.

At approximately the center of the shaft or pipe 3| and rigidly mounted thereon is an adjusting lever 31, to the'upper end of which is pivotally attached one end of an operating rod 50 38. The other end of the rod 38 is pivotally attached to an operating lever 39 that is pivotally attached to the stress bar I8. At 48 is a notched circular segment that is rigidly attached to the stress bar I8. The lever 39 is provided with a 55 dog that is adapted to enter the notches in-the segment 40 as a means of locking the lever 39 in any adjusted position, the dog being operable from the hand piece 4| on the lever 39 in the usual manner as will readily be understood.

On the shaft or pipe 3| is rigidly mounted a series of Spring harrow teeth 42. 'I'hese teeth are so positioned on the pipe 3| that they occupy the space intermediate the lines of travel of the drill discs 20, the object of which will later be made obvious.

'Ihe supplementary leg elements 25 at the outside, or ends of the frame elements and |3 are provided with an L-shaped piece 43 that is rigidly attached either by rivets or bolts 44 to the supplementary legs 25 just above the bearing formation for the shaft or pipe 3|.

At 45 and 46 are guy rods; one end of the guy rod 45 being attached to the tongue element at the point 41 and the other end of the guy rod 45 being attached to the L-shaped piece 43 at the point 48 so as to brace the right hand end of the shaft 3| against a rearward movement when the harrow teeth 42 are in the ground.

Similarly one end of the guy rod 46 is attached to the tongue element at the point 49,- and the other end of the guy rod 46 is attached to the L-shaped piece 43 at the point 50 as and for the same purpose as that of the guy rod 45.

At 5| and 52 is shown a pair of brace rods, the outer ends of which are rigidly attached to the tongue elements I6 and Il at the points 53 and 54. The inner ends of the brace rods 5| and 52 being bent to form a bearing in which is revolvably held the pipe 3| at the points 55 and 56. These brace rods 5| and 52 function as a support for the shaft 3| so as to prevent a rearward movement of the shaft 3| when the harrow teeth 42 are in the ground and the drill is being pulled along.

The operation of the device is as follows: The tongue element is hitched to a suitable source of power, preferably a tractor, after which the adjusting lever 39 is rocked rearwardly whereupon the rod 38 will push the lever 31 rearwardly to revolve the shaft 3| to a position where the points of the harrow teeth 42 will enter the ground to the desired depth whereupon the lever 39 becomes locked to the notched segment 40 as will be readily understood. This having been done, the chain 35 on the levers 34 and 34a are hooked on the hooks 36 so that there is no slack left in the chain and the levers 34 and 34a are rigidly held so as to hold the pipe 3| against rotation urged by the harrow teeth 42 as the machine is pulled along.

-The harrow teeth 42 are shown as being a curved spring tooth; this type of tooth is probably preferable to use although it will be understood that any other type or design of tooth may be used if desired.

Such modifications of my invention may be employed as lie, within the scope of the appended claim without departing from the spirit and invention of my invention. Now having fully described my invention, what I claim as new and desire to secure by Letters Patent is:

In a harrow attachment for drills; in combination with a drill frame having a tongue thereon, and carrying a plurality of discs; a plurality of bracket elements and a round tubular supporting element, each of the bracket elements having an upper and lower portion, said upper portion being rigidly mounted on the drill frame, said lower portion being adjustable vertically and then rigidly attachable to the said upper portion, the lower end of the said lower portion of the brackets being bent in a circular formation to form a bearing in which the round tubular supporting element is revolvably mounted, and means connecting between said tongue and the lower end of each of said brackets for preventing the rearward movement of said brackets, a plurality of ground working elements rigidly mounted on the tubular supporting element and intermediate the lines of travel of said discs, and means for revolving said tubular supporting element and locking the same in xed position for the purpose of adjusting the position of the ground working elements, and other means carried on said tubular supporting element, and adjustably connectable to said drill frame for the purposel of preventing rotation of the tubular supporting element under the influence of the ground working elements.

JAMES A. CHARLES. 

